/*
 * This file is part of QtEmu project.
 * Copyright (C) 2006-2009 Urs Wolfer <uwolfer @ fwo.ch> and Ben Klopfenstein <benklop gmail com>
 * Copyright (C) 2017-2023 Sergio Carlavilla <sergio.carlavilla91 @ gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

// Local
#include "aboutwidget.h"

/**
 * @brief About window
 * @param parent, widget parent
 *
 * About window with the about, authors and license information
 */
AboutWidget::AboutWidget(QWidget *parent) : QWidget(parent)
{
    this->setWindowTitle(tr("About") + " - QtEmu");
    this->setWindowIcon(QIcon::fromTheme("qtemu",
                                         QIcon(":/images/qtemu.png")));
    this->setWindowFlag(Qt::Window);
    this->setFixedSize(625, 320);

    m_closeButton = new QPushButton(QIcon::fromTheme("window-close",
                                                     QIcon(QPixmap(":/images/icons/breeze/32x32/window-close.svg"))),
                                    tr("&Close"),
                                    this);
    connect(m_closeButton, &QAbstractButton::clicked,
            this, &QWidget::hide);

    QList<QKeySequence> closeShortcuts;
    closeShortcuts << QKeySequence(Qt::Key_Escape);
    m_closeAction = new QAction(this);
    m_closeAction->setShortcuts(closeShortcuts);
    connect(m_closeAction, &QAction::triggered,
            this, &QWidget::hide);
    this->addAction(m_closeAction);

    m_tabWidget = new QTabWidget(this);
    m_tabWidget->addTab(new AboutTab(), tr("About"));
    m_tabWidget->addTab(new AuthorsTab(), tr("Authors"));
    m_tabWidget->addTab(new LicenseTab(), tr("License"));

    m_mainLayout = new QVBoxLayout(this);

    m_iconLayout = new QHBoxLayout();
    m_iconLayout->setContentsMargins(0, 12, 0, 0);

    m_qtemuIcon = new QLabel(this);
    m_qtemuIcon->setPixmap(QPixmap(":/images/qtemu.png"));
    m_iconLayout->addWidget(m_qtemuIcon, 0, Qt::AlignTop);

    m_qtemuAppInfo = new QLabel(QString("<h3><strong>%1 v%2</strong></h3>")
                                .arg(qApp->applicationName())
                                .arg(qApp->applicationVersion()), this);
    m_qtemuAppInfo->setContentsMargins(10, 0, 0, 0);

    m_iconLayout->addWidget(m_qtemuAppInfo, 1, Qt::AlignTop);
    m_mainLayout->addItem(m_iconLayout);
    m_mainLayout->addWidget(m_tabWidget, 0);
    m_mainLayout->addWidget(m_closeButton, 1, Qt::AlignRight);

    qDebug() << "AboutWidget created";
}

AboutWidget::~AboutWidget()
{
    qDebug() << "AboutWidget destroyed";
}

void AboutWidget::closeEvent(QCloseEvent *event)
{
    this->hide();
    event->ignore();
}

void AboutWidget::hideEvent(QHideEvent *event)
{
    event->accept();
}

/**
 * @brief About tab
 * @param parent, widget parent
 *
 * About tab with information about QtEmu, the copyright and the url of the site
 */
AboutTab::AboutTab(QWidget *parent) : QWidget(parent)
{
    QLabel *about = new QLabel(tr("QtEmu is a graphical user interface for QEMU"), this);
    QLabel *copyright = new QLabel("Copyright (C) 2006-2009 Urs Wolfer and Ben Klopfenstein\nCopyright (C) 2017-2023 Sergio Carlavilla Delgado", this);
    QLabel *urlSite = new QLabel("<a href=\"https://www.qtemu.org\">www.qtemu.org</a>", this);

    m_mainLayout = new QVBoxLayout(this);
    m_mainLayout->addWidget(about);
    m_mainLayout->addWidget(copyright);
    m_mainLayout->addWidget(urlSite, 0, Qt::AlignCenter);

}

AboutTab::~AboutTab()
{
    qDebug() << "AboutTab destroyed";
}

/**
 * @brief Authors tab
 * @param parent, widget parent
 *
 * Authors tab with information about the authors
 */
AuthorsTab::AuthorsTab(QWidget *parent) : QWidget(parent)
{
    QString authors;

    authors.append(
                   "<p>"
                       "Urs Wolfer<br />"
                       "&nbsp;&nbsp;" + tr("Email") + ": <a href=\"mailto\">uwolfer@fwo.ch</a><br />"
                       "&nbsp;&nbsp;Original developer"
                   "</p>"
                   "<p>"
                      "Ben Klopfenstein<br />"
                      "&nbsp;&nbsp;" + tr("Email") + ": <a href=\"mailto\">benklop@gmail.com</a><br />"
                      "&nbsp;&nbsp;Past developer, added some features"
                   "</p>"
                   "<p>"
                      "Sergio Carlavilla Delgado<br />"
                      "&nbsp;&nbsp;" + tr("Email") + ": <a href=\"mailto\">sergio.carlavilla91@gmail.com</a><br />"
                      "&nbsp;&nbsp;Current developer"
                   "</p>"
                   );

    m_authorsBrowser = new QTextBrowser(this);
    m_authorsBrowser->setReadOnly(true);
    m_authorsBrowser->setOpenExternalLinks(false);
    m_authorsBrowser->setHtml(authors);

    m_mainLayout = new QVBoxLayout(this);
    m_mainLayout->setContentsMargins(2, 2, 2, 2);
    m_mainLayout->addWidget(m_authorsBrowser, 0);

}

AuthorsTab::~AuthorsTab()
{
    qDebug() << "AuthorsTab destroyed";
}

/**
 * @brief License tab
 * @param parent, widget parent
 *
 * License tab with information about the License of QtEmu, GPLv2
 */
LicenseTab::LicenseTab(QWidget *parent) : QWidget(parent)
{
    QString license;
    license.append("<center><p><strong>GNU GENERAL PUBLIC LICENSE</strong></p></center>"
                   "<center><p>Version 2, June 1991<p></center>"
                    "<hr />"
                   "<p>"
                      "Copyright (C) 1989, 1991 Free Software Foundation, Inc."
                      "51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA"
                   "</p>"
                   "<p>"
                      "Everyone is permitted to copy and distribute verbatim copies"
                      "of this license document, but changing it is not allowed."
                   "</p>"
                   "<p><strong>Preamble</strong></p>"
                   "<p>"
                      "The licenses for most software are designed to take away your freedom "
                      "to share and change it. By contrast, the GNU General Public License is "
                      "intended to guarantee your freedom to share and change free software--to "
                      "make sure the software is free for all its users. This General Public License "
                      "applies to most of the Free Software Foundation's software and to any other "
                      "program whose authors commit to using it. (Some other Free Software Foundation "
                      "software is covered by the GNU Lesser General Public License instead.) "
                      "You can apply it to your programs, too."
                   "</p>"
                   "<p>"
                      "When we speak of free software, we are referring to freedom, not price. Our "
                      "General Public Licenses are designed to make sure that you have the freedom to "
                      "distribute copies of free software (and charge for this service if you wish), "
                      "that you receive source code or can get it if you want it, that you can change "
                      "the software or use pieces of it in new free programs; and that you know you can do these things."
                   "</p>"
                   "<p>"
                      "To protect your rights, we need to make restrictions that forbid anyone to deny "
                      "you these rights or to ask you to surrender the rights. These restrictions translate "
                      "to certain responsibilities for you if you distribute copies of the software, or if you modify it. "
                   "</p>"
                   "<p>"
                      "For example, if you distribute copies of such a program, whether gratis or for a fee, "
                      "you must give the recipients all the rights that you have. You must make sure that they, "
                      "too, receive or can get the source code. And you must show them these terms so they know their rights. "
                   "</p>"
                   "<p>"
                      "We protect your rights with two steps: (1) copyright the software, and (2) offer you this license "
                      "which gives you legal permission to copy, distribute and/or modify the software. "
                   "</p>"
                   "<p>"
                      "Also, for each author's protection and ours, we want to make certain that everyone understands that "
                      "there is no warranty for this free software. If the software is modified by someone else and passed on, "
                      "we want its recipients to know that what they have is not the original, so that any problems introduced "
                      "by others will not reflect on the original authors' reputations. "
                   "</p>"
                   "<p>"
                      "Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that "
                      "redistributors of a free program will individually obtain patent licenses, in effect making the program "
                      "proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free "
                      "use or not licensed at all. "
                   "</p>"
                   "<p>"
                      "The precise terms and conditions for copying, distribution and modification follow. "
                   "</p>"
                   "<p><strong>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</strong></p>"
                   "<p>"
                      "<strong>0. </strong>  This License applies to any program or other work which contains "
                      "a notice placed by the copyright holder saying it may be distributed under the terms of "
                      "this General Public License. The \"Program\", below, refers to any such program or work, "
                      "and a \"work based on the Program\" means either the Program or any derivative work under "
                      "copyright law: that is to say, a work containing the Program or a portion of it, either "
                      "verbatim or with modifications and/or translated into another language. (Hereinafter, "
                      "translation is included without limitation in the term \"modification\".) Each "
                      "licensee is addressed as \"you\"."
                   "</p>"
                   "<p>"
                      "Activities other than copying, distribution and modification are not covered by this License; "
                      "they are outside its scope. The act of running the Program is not restricted, and the output "
                      "from the Program is covered only if its contents constitute a work based on the Program "
                      "(independent of having been made by running the Program). Whether that is true depends "
                      "on what the Program does. "
                   "</p>"
                   "<p>"
                      "<strong>1. </strong> You may copy and distribute verbatim copies of the Program's source "
                      "code as you receive it, in any medium, provided that you conspicuously and appropriately "
                      "publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact "
                      "all the notices that refer to this License and to the absence of any warranty; and give any "
                      "other recipients of the Program a copy of this License along with the Program. "
                   "</p>"
                   "<p>"
                      "You may charge a fee for the physical act of transferring a copy, and you may at your option "
                      "offer warranty protection in exchange for a fee. "
                   "</p>"
                   "<p>"
                      "<strong>2. </strong> You may modify your copy or copies of the Program or any portion of it, "
                      "thus forming a work based on the Program, and copy and distribute such modifications or work "
                      "under the terms of Section 1 above, provided that you also meet all of these conditions: "
                   "</p>"
                   "<p>"
                      "<strong>a)</strong> You must cause the modified files to carry prominent notices stating that you "
                      "changed the files and the date of any change. "
                   "</p>"
                   "<p>"
                      "<strong>b)</strong> You must cause any work that you distribute or publish, that in whole or in "
                      "part contains or is derived from the Program or any part thereof, to be licensed as a whole at "
                      "no charge to all third parties under the terms of this License. "
                   "</p>"
                   "<p>"
                      "<strong>c)</strong> If the modified program normally reads commands interactively when run, you "
                      "must cause it, when started running for such interactive use in the most ordinary way, to print or "
                      "display an announcement including an appropriate copyright notice and a notice that there is no "
                      "warranty (or else, saying that you provide a warranty) and that users may redistribute the program "
                      "under these conditions, and telling the user how to view a copy of this License. (Exception: "
                      "if the Program itself is interactive but does not normally print such an announcement, "
                      "your work based on the Program is not required to print an announcement.) "
                   "</p>"
                   "<p>"
                      "These requirements apply to the modified work as a whole. If identifiable sections of that work "
                      "are not derived from the Program, and can be reasonably considered independent and separate works "
                      "in themselves, then this License, and its terms, do not apply to those sections when you distribute "
                      "them as separate works. But when you distribute the same sections as part of a whole which is a work "
                      "based on the Program, the distribution of the whole must be on the terms of this License, whose "
                      "permissions for other licensees extend to the entire whole, and thus to each and every part regardless "
                      "of who wrote it. "
                   "</p>"
                   "<p>"
                      "Thus, it is not the intent of this section to claim rights or contest your rights to work written "
                      "entirely by you; rather, the intent is to exercise the right to control the distribution of derivative "
                      "or collective works based on the Program. "
                   "</p>"
                   "<p>"
                      "In addition, mere aggregation of another work not based on the Program with the Program (or with a "
                      "work based on the Program) on a volume of a storage or distribution medium does not bring the other "
                      "work under the scope of this License. "
                   "</p>"
                   "<p>"
                      "<strong>3.</strong> You may copy and distribute the Program (or a work based on it, under Section 2) in "
                      "object code or executable form under the terms of Sections 1 and 2 above provided that you also do one "
                      "of the following: "
                   "</p>"
                   "<p>"
                      "<strong>a)</strong> Accompany it with the complete corresponding machine-readable source code, which "
                      "must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software "
                      "interchange; or, "
                   "</p>"
                   "<p>"
                      "<strong>b)</strong> Accompany it with a written offer, valid for at least three years, to give any third "
                      "party, for a charge no more than your cost of physically performing source distribution, a complete "
                      "machine-readable copy of the corresponding source code, to be distributed under the terms of Sections "
                      "1 and 2 above on a medium customarily used for software interchange; or, "
                   "</p>"
                   "<p>"
                      "<strong>c)</strong> Accompany it with the information you received as to the offer to distribute "
                      "corresponding source code. (This alternative is allowed only for noncommercial distribution and only "
                      "if you received the program in object code or executable form with such an offer, in accord with "
                      "Subsection b above.) "
                   "</p>"
                   "<p>"
                      "The source code for a work means the preferred form of the work for making modifications to it. For an "
                      "executable work, complete source code means all the source code for all modules it contains, plus any "
                      "associated interface definition files, plus the scripts used to control compilation and installation of "
                      "the executable. However, as a special exception, the source code distributed need not include anything "
                      "that is normally distributed (in either source or binary form) with the major components (compiler, "
                      "kernel, and so on) of the operating system on which the executable runs, unless that component itself "
                      "accompanies the executable. "
                   "</p>"
                   "<p>"
                      "If distribution of executable or object code is made by offering access to copy from a designated place, "
                      "then offering equivalent access to copy the source code from the same place counts as distribution of the "
                      "source code, even though third parties are not compelled to copy the source along with the object code. "
                   "</p>"
                   "<p>"
                      "<strong>4.</strong> You may not copy, modify, sublicense, or distribute the Program except as expressly "
                      "provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is "
                      "void, and will automatically terminate your rights under this License. However, parties who have received "
                      "copies, or rights, from you under this License will not have their licenses terminated so long as such parties "
                      "remain in full compliance. "
                   "</p>"
                   "<p>"
                      "<strong>5.</strong> You are not required to accept this License, since you have not signed it. However, "
                      "nothing else grants you permission to modify or distribute the Program or its derivative works. These actions "
                      "are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program "
                      "(or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms "
                      "and conditions for copying, distributing or modifying the Program or works based on it."
                   "</p>"
                   "<p>"
                      "<strong>6.</strong> Each time you redistribute the Program (or any work based on the Program), the recipient "
                      "automatically receives a license from the original licensor to copy, distribute or modify the Program subject "
                      "to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of "
                      "the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. "
                   "</p>"
                   "<p>"
                      "<strong>7.</strong> If, as a consequence of a court judgment or allegation of patent infringement or for any "
                      "other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement "
                      "or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of "
                      "this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and "
                      "any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, "
                     "if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies "
                      "directly or indirectly through you, then the only way you could satisfy both it and this License would be to "
                      "refrain entirely from distribution of the Program. "
                   "</p>"
                   "<p>"
                      "any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of "
                      "the section is intended to apply and the section as a whole is intended to apply in other circumstances. "
                   "</p>"
                   "<p>"
                      "It is not the purpose of this section to induce you to infringe any patents or other property right claims or "
                      "to contest validity of any such claims; this section has the sole purpose of protecting the integrity of "
                      "the free software distribution system, which is implemented by public license practices. Many people have made "
                      "generous contributions to the wide range of software distributed through that system in reliance on consistent "
                      "application of that system; it is up to the author/donor to decide if he or she is willing to distribute "
                      "software through any other system and a licensee cannot impose that choice. "
                   "</p>"
                   "<p>"
                      "This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. "
                   "</p>"
                   "<p>"
                      "<strong>8.</strong> If the distribution and/or use of the Program is restricted in certain countries either "
                      "by patents or by copyrighted interfaces, the original copyright holder who places the Program under this "
                      "License may add an explicit geographical distribution limitation excluding those countries, so that distribution "
                      "is permitted only in or among countries not thus excluded. In such case, this License incorporates the "
                      "limitation as if written in the body of this License. "
                   "</p>"
                   "<p>"
                      "<strong>9.</strong> The Free Software Foundation may publish revised and/or new versions of the General Public "
                      "License from time to time. Such new versions will be similar in spirit to the present version, but may differ "
                      "in detail to address new problems or concerns. "
                   "</p>"
                   "<p>"
                      "Each version is given a distinguishing version number. If the Program specifies a version number of this License "
                      "which applies to it and \"any later version\", you have the option of following the terms and conditions either "
                      "of that version or of any later version published by the Free Software Foundation. If the Program does not "
                      "specify a version number of this License, you may choose any version ever published by the Free Software "
                      "Foundation. "
                   "</p>"
                   "<p>"
                      "<strong>10.</strong> If you wish to incorporate parts of the Program into other free programs whose distribution "
                      "conditions are different, write to the author to ask for permission. For software which is copyrighted by the "
                      "Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our "
                      "decision will be guided by the two goals of preserving the free status of all derivatives of our free software "
                      "and of promoting the sharing and reuse of software generally. "
                   "</p>"
                   "<p>"
                   "<strong>NO WARRANTY</strong>"
                   "</p>"
                   "<p>"
                      "<strong>11.</strong> BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, "
                      "TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS "
                      "AND/OR OTHER PARTIES PROVIDE THE PROGRAM \"AS IS\" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR "
                      "IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A "
                      "PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. "
                      "SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. "
                   "</p>"
                   "<p>"
                      "<strong>12.</strong> IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY "
                      "COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, "
                      "BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING "
                      "OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING "
                      "RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE "
                      "WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH "
                      "DAMAGES. "
                   "</p>"
                   "<p><center><strong>END OF TERMS AND CONDITIONS</strong></center></p>"
                    );

    m_licenseBrowser = new QTextBrowser(this);
    m_licenseBrowser->setReadOnly(true);
    m_licenseBrowser->setOpenExternalLinks(false);
    m_licenseBrowser->setHtml(license);

    m_mainLayout = new QVBoxLayout(this);
    m_mainLayout->setContentsMargins(2, 2, 2, 2);
    m_mainLayout->addWidget(m_licenseBrowser, 0);
}

LicenseTab::~LicenseTab()
{
    qDebug() << "LicenseTab destroyed";
}
